NOCO Boost Plus GB40 1000A UltraSafe Lithium Jump Starter

Jump Starters

NOCO GB40

Name: NOCO GB40
Brand: NOCO

#6 · Best All-Weather Glovebox Pack

5.9 /10 Our score

Lowest verified price $99.95 Amazon

Our verdict

A dependable weatherproof pack for typical cars and small SUVs. It ranks last on our weighted score because of its small battery, but it suits owners who value size and weather resistance. If you order one, check that the port is USB-C.

Pros

IP65 water and dust resistance
Compact at 2.4 lb
Spark-proof and reverse-polarity protection
Recommended by four major test outlets
Sold by Amazon

Cons

Small usable battery: 15.57 Wh measured
Very short leads (about 6 in.), so the pack must sit on the battery
Slow 10W USB-C and about 3 hours to recharge
Soft bag rather than a hard case

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View best price at Amazon

Last reviewed October 25, 2026

Review

What to know about NOCO GB40

A compact (2.4 lb), IP65-rated 1000A lithium jump starter rated for engines up to 6.0L gas and 3.0L diesel. It is the most widely recommended glovebox pack in independent tests. It suits typical cars and small SUVs in all weather, but not big V8s or diesels, and its usable battery capacity is small.

Editorial notes

Why it stands out

Why we like it

It is the most widely recommended glovebox pack in our research. TechGearLab, Outdoor Life (Best All Weather), The Drive (Best Overall) and Car and Driver (Most Compact) all recommend it.

It has spark-proof and reverse-polarity protection, and TechGearLab saw no sparks in testing. The IP65 rating is the strongest weather protection in this group.

What to know

Skip it if you drive a big V8 or diesel, or want to start a fully dead battery repeatedly. TechGearLab measured only 15.57 Wh usable, and Car and Driver needed the override for a dead battery.

Performance

Score breakdown

Starting Power

Ability to start a fully dead or deeply discharged battery on the intended engine size, including repeated back-to-back starts and cold-weather performance, as shown in independent tests (TechGearLab 3x rapid-start, Car and Driver dead-battery tests, Outdoor Life V8 tests).

6.5

Fine for typical cars; needed the override on a dead battery; 6L gas/3L diesel limit.

Battery Capacity & Standby

Measured usable energy versus claimed, jumps per charge, standby charge retention and recharge speed.

4.0

15.57 Wh measured of 24 Wh claimed; one jump took it to 25%.

Ease of Use & Safety Features

Clamp quality and size, cable length and gauge, clarity of the display and indicators, spark-proof and reverse-polarity protection, and how easy the boost/override mode is to use.

6.0

6-inch leads and stiff clamps; simple controls; spark-proof.

Build Quality & Durability

Construction, water and dust resistance (IP rating), quality of cables and clamps, storage case, and warranty length.

7.8

IP65 with a long track record; soft bag only.

Versatility

Extra functions such as USB-C PD power bank, 12V DC output, air compressor, work light and alternator check.

4.5

10W USB and a light only.

Battery Safety & Sustainability

Battery chemistry and fire risk, verified safety certification (UL 2743), CPSC recalls or warnings, Prop 65/lead content, replaceable batteries and parts, and end-of-life recyclability.

6.0

No sparks seen in testing; Prop 65 notice; no UL 2743 confirmed.

Value

Performance and features delivered relative to typical street price.

6.0

$99.95 is high for its capacity.

Specifications

NOCO GB40 specs

Power

Peak Current: 1000 A
Max Gas Engine (rated): 6 L
Max Diesel Engine (rated): 3 L

Battery

Battery Chemistry: Lithium-ion
Rated Capacity: 24 Wh
Measured Usable Capacity (TechGearLab): 15.57 Wh

Physical

Weight: 2.4 lb
Water/Dust Rating: IP65

Features

Built-in Air Compressor: No
Max USB Output: 10 W

Shopping

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Prices are checked periodically. Older amounts are labeled with their last verification date.

Disclosure: We may earn a commission when you purchase through links on this page. This does not affect our editorial rankings.

Prices and availability may change. The retailer's price and availability at checkout govern the transaction.

Retailer	Price	Availability
AmazonLowest	$99.95 $124.95	In Stock	View deal
Walmart	$99.95 Last known price — verified Oct 25, 2026; may have changed	Check at retailer	Check at retailer
Best Buy	$99.95 Last known price — verified Oct 25, 2026; may have changed	Last reported: In Stock	Check at retailer

Lowest verified price $99.95

30-day low $99.95

90-day average $99.95

90-day low $99.95

Based on 4 retailer price observations captured during the last 90 days.

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